Blackmagic Design URSA MiniAccording to Neil K., these Komputerbay 3600x 256GB cards work fine on the URSA Mini 4.6K whilst recording CinemaDNG RAW at 4.6K. However there is no data on other recording modes, or data from an extensive and thorough test. However the fact that these cards work fine on the 4.6K model suggest a (near) full compatibility with the URSA Mini 4K.Source:Amazon User Review - Neil K.